> There's an author I know who does "live writes", which are essentially the same as this but for drafts of prose (she does them via shared Google Docs).
Harlan Ellison ofter wrote short stories in a storefront using ideas tossed out by on-lookers. I'd love to see the programming equivalent, particular in the game space. It'd go a long way towards settling the art versus science debate--and I doubt there are but a handful (including Notch) who could perform the kind of improv that someone like Ellison did in his medium.
Recently I attended a gathering where about ten people tossed out ideas for an interactive fiction game as it was being live-coded in Inform 7. It was surprisingly fun (and if we had a better grasp of the language it would have been even more).
Who knew that Monty Python would so accurately predict the future? Their Novel Writing skit is exactly this: https://www.youtube.com/watch?v=ogPZ5CY9KoM